FREE

$9.95/mo

$39.95/mo

$99.95/mo

Welcome to PatentBuddy 2.0! Please enjoy the 30+ day free trial of our level membership. If you wish to continue with a paid membership, please select a membership plan before the year end expiration date. Otherwise, all portfolios and watches will be reset to our free membership plan after the expiration date.

Importance

Abstract

A combination kneader/compactor and plane-strain, simple shear testing apparatus for use in testing paving materials by subjecting them to anticipated design stress over a range of temperatures and various rates of shear. The sample is compacted to the ultimate in-place (equilibrium) density that occurs in the pavement structures. This apparatus and method pre-stresses the sample under the actual stress anticipated for the structure and use the anticipated theoretical vertical stress to fully compact the sample followed by a plane strain simple shear test to measure the dimensionally correct shear strength and moduli which are used to calculate the dimensionally correct design parameters. Pertinent variables are displayed on a computer screen during testing followed by print out of a graph and data sheets with relevant design data. Fundamental engineering (stress-strain) measurements including rational shear strength and static as wall as dynamic moduli are obtained which are suitable for use in design calculations in a rational engineering approach to flexible pavement design in lieu of conventional empirical correlations. The optimum bitumen or water content is precisely determined on the basis of the elasto-plastic property response under simulated traffic, independently of conventional empirical correlations with a percentage of voids and empirical shear indices. Precisely controlled cyclic shear deformation is introduced while the sample is subjected to the anticipated design vertical stress, this being analogous to what happens in the pavement beneath a moving vehicle tire. Thus this laboratory testing machine becomes an accelerated traffic simulator.

Confirm Your Purchase

You will be charged $ for this report.

Note: If you have previously downloaded this report you may access it here.

Please note that data in portions of the Examination Report will not be meaningful if:
A. An examiner has not been assigned to the application,
B. An assignment has not yet been filed with the USPTO or the assignee is otherwise unknown, or
C. The assignee of this application has limited or no previous history with the examiner or the art unit listed in this report.

Add Patents to Portfolio

Important Notes on Latency of Status data

Please note there is up to 60 days of latency in this Status indicator for certain status conditions. You can obtain up-to-date Status indicator readings by ordering PAIR for the file.

An application with the status "Published" (which means it is pending) may be recently abandoned, but not yet updated to reflect its abandoned status. However, an application filed less than one year ago is unlikely to be abandoned.

A patent with the status "Granted" may be recently expired, but not yet updated to reflect its expired status. However, it is highly unlikely a patent less than 3.5 years old would be expired.

An application with the status "Abandoned" is almost always current, but there is a small chance it was recently revived and the status not yet updated.

Important
Note on Priority Date data

This priority date is an estimated earliest
priority date and is purely an estimation. This date should not be
taken as legal conclusion. No representations are made as to the
accuracy of the date listed. Please consult a legal professional
before relying on this date.